/*
 * Facebox (for jQuery)
 * version: 1.3
 * @requires jQuery v1.2 or later
 * @homepage https://github.com/defunkt/facebox
 *
 * Licensed under the MIT:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Copyright Forever Chris Wanstrath, Kyle Neath
 *
 * Usage:
 *
 *  jQuery(document).ready(function() {
 *    jQuery('a[rel*=facebox]').facebox()
 *  })
 *
 *  <a href="#terms" rel="facebox">Terms</a>
 *    Loads the #terms div in the box
 *
 *  <a href="terms.html" rel="facebox">Terms</a>
 *    Loads the terms.html page in the box
 *
 *  <a href="terms.png" rel="facebox">Terms</a>
 *    Loads the terms.png image in the box
 *
 *
 *  You can also use it programmatically:
 *
 *    jQuery.facebox('some html')
 *    jQuery.facebox('some html', 'my-groovy-style')
 *
 *  The above will open a facebox with "some html" as the content.
 *
 *    jQuery.facebox(function($) {
 *      $.get('blah.html', function(data) { $.facebox(data) })
 *    })
 *
 *  The above will show a loading screen before the passed function is called,
 *  allowing for a better ajaxy experience.
 *
 *  The facebox function can also display an ajax page, an image, or the contents of a div:
 *
 *    jQuery.facebox({ ajax: 'remote.html' })
 *    jQuery.facebox({ ajax: 'remote.html' }, 'my-groovy-style')
 *    jQuery.facebox({ image: 'stairs.jpg' })
 *    jQuery.facebox({ image: 'stairs.jpg' }, 'my-groovy-style')
 *    jQuery.facebox({ div: '#box' })
 *    jQuery.facebox({ div: '#box' }, 'my-groovy-style')
 *
 *  Want to close the facebox?  Trigger the 'close.facebox' document event:
 *
 *    jQuery(document).trigger('close.facebox')
 *
 *  Facebox also has a bunch of other hooks:
 *
 *    loading.facebox
 *    beforeReveal.facebox
 *    reveal.facebox (aliased as 'afterReveal.facebox')
 *    init.facebox
 *    afterClose.facebox
 *
 *  Simply bind a function to any of these hooks:
 *
 *   $(document).bind('reveal.facebox', function() { ...stuff to do after the facebox and contents are revealed... })
 *
 */
(function($) {
$.facebox = function(data, klass) {
	$.facebox.loading()

	if (data.ajax) fillFaceboxFromAjax(data.ajax, klass)
	else if (data.image) fillFaceboxFromImage(data.image, klass)
	else if (data.div) fillFaceboxFromHref(data.div, klass)
	else if ($.isFunction(data)) data.call($)
	else $.facebox.reveal(data, klass)
}

/*
   * Public, $.facebox methods
   */

$.extend($.facebox, {
	settings: {
	  opacity      : 0.2,
	  overlay      : true,
	  loadingImage : '/facebox/loading.gif',
	  closeImage   : '/facebox/closelabel.png',
	  imageTypes   : [ 'png', 'jpg', 'jpeg', 'gif' ],
	  faceboxHtml  : '\
	<div id="facebox" style="display:none;"> \
	  <div class="popup"> \
		<div class="content"> \
		</div> \
		<a href="#" class="close"></a> \
	  </div> \
	</div>'
	},

	loading: function() {
	  init()
	  if ($('#facebox .loading').length == 1) return true
	  showOverlay()

	  $('#facebox .content').empty().
		append('<div class="loading"><img src="'+$.facebox.settings.loadingImage+'"/></div>')

	  $('#facebox').show().css({
		top:	getPageScroll()[1] + (getPageHeight() / 10),
		left:	$(window).width() / 2 - ($('#facebox .popup').outerWidth() / 2),
		"z-index": 1000000
	  })

	  $(document).bind('keydown.facebox', function(e) {
		if (e.keyCode == 27) $.facebox.close()
		return true
	  })
	  $(document).trigger('loading.facebox')
	},

	reveal: function(data, klass) {
	  $(document).trigger('beforeReveal.facebox')
	  if (klass) $('#facebox .content').addClass(klass)
	  $('#facebox .content').empty().append(data)
	  $('#facebox .popup').children().fadeIn('normal')
	  $('#facebox').css('left', $(window).width() / 2 - ($('#facebox .popup').outerWidth() / 2))
	  $(document).trigger('reveal.facebox').trigger('afterReveal.facebox')
	},

	close: function() {
	  $(document).trigger('close.facebox')
	  return false
	}
})

/*
   * Public, $.fn methods
   */

$.fn.facebox = function(settings) {
	if ($(this).length == 0) return

	init(settings)

	function clickHandler() {
	  $.facebox.loading(true)

	  // support for rel="facebox.inline_popup" syntax, to add a class
	  // also supports deprecated "facebox[.inline_popup]" syntax
	  var klass = this.rel.match(/facebox\[?\.(\w+)\]?/)
	  if (klass) klass = klass[1]

	  fillFaceboxFromHref(this.href, klass)
	  return false
	}

	return this.bind('click.facebox', clickHandler)
}

/*
   * Private methods
   */

// called one time to setup facebox on this page
function init(settings) {
	if ($.facebox.settings.inited) return true
	else $.facebox.settings.inited = true

	$(document).trigger('init.facebox')
	makeCompatible()

	var imageTypes = $.facebox.settings.imageTypes.join('|')
	$.facebox.settings.imageTypesRegexp = new RegExp('\\.(' + imageTypes + ')(\\?.*)?$', 'i')

	if (settings) $.extend($.facebox.settings, settings)
	$('body').append($.facebox.settings.faceboxHtml)

	var preload = [ new Image(), new Image() ]
	preload[0].src = $.facebox.settings.closeImage
	preload[1].src = $.facebox.settings.loadingImage

	$('#facebox').find('.b:first, .bl').each(function() {
	  preload.push(new Image())
	  preload.slice(-1).src = $(this).css('background-image').replace(/url\((.+)\)/, '$1')
	})

	$('#facebox .close')
	  .click($.facebox.close)
	  .append('<img src="'
			  + $.facebox.settings.closeImage
			  + '" class="close_image" title="close">')
}

// getPageScroll() by quirksmode.com
function getPageScroll() {
	var xScroll, yScroll;
	if (self.pageYOffset) {
	  yScroll = self.pageYOffset;
	  xScroll = self.pageXOffset;
	} else if (document.documentElement && document.documentElement.scrollTop) {	 // Explorer 6 Strict
	  yScroll = document.documentElement.scrollTop;
	  xScroll = document.documentElement.scrollLeft;
	} else if (document.body) {// all other Explorers
	  yScroll = document.body.scrollTop;
	  xScroll = document.body.scrollLeft;
	}
	return new Array(xScroll,yScroll)
}

// Adapted from getPageSize() by quirksmode.com
function getPageHeight() {
	var windowHeight
	if (self.innerHeight) {	// all except Explorer
	  windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
	  windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
	  windowHeight = document.body.clientHeight;
	}
	return windowHeight
}

// Backwards compatibility
function makeCompatible() {
	var $s = $.facebox.settings

	$s.loadingImage = $s.loading_image || $s.loadingImage
	$s.closeImage = $s.close_image || $s.closeImage
	$s.imageTypes = $s.image_types || $s.imageTypes
	$s.faceboxHtml = $s.facebox_html || $s.faceboxHtml
}

// Figures out what you want to display and displays it
// formats are:
//     div: #id
//   image: blah.extension
//    ajax: anything else
function fillFaceboxFromHref(href, klass) {
	// div
	if (href.match(/#/)) {
	  var url    = window.location.href.split('#')[0]
	  var target = href.replace(url,'')
	  if (target == '#') return
	  $.facebox.reveal($(target).html(), klass)

	// image
	} else if (href.match($.facebox.settings.imageTypesRegexp)) {
	  fillFaceboxFromImage(href, klass)
	// ajax
	} else {
	  fillFaceboxFromAjax(href, klass)
	}
}

function fillFaceboxFromImage(href, klass) {
	var image = new Image()
	image.onload = function() {
	  $.facebox.reveal('<div class="image"><img src="' + image.src + '" /></div>', klass)
	}
	image.src = href
}

function fillFaceboxFromAjax(href, klass) {
	$.get(href, function(data) { $.facebox.reveal(data, klass) })
}

function skipOverlay() {
	return $.facebox.settings.overlay == false || $.facebox.settings.opacity === null
}

function showOverlay() {
	if (skipOverlay()) return

	if ($('#facebox_overlay').length == 0)
	  $("body").append('<div id="facebox_overlay" class="facebox_hide"></div>')

	$('#facebox_overlay').hide().addClass("facebox_overlayBG")
	  .css('opacity', $.facebox.settings.opacity)
	  .click(function() { $(document).trigger('close.facebox') })
	  .fadeIn(200)
	return false
}

function hideOverlay() {
	if (skipOverlay()) return

	$('#facebox_overlay').fadeOut(200, function(){
	  $("#facebox_overlay").removeClass("facebox_overlayBG")
	  $("#facebox_overlay").addClass("facebox_hide")
	  $("#facebox_overlay").remove()
	})

	return false
}

/*
   * Bindings
   */

$(document).bind('close.facebox', function() {
	$(document).unbind('keydown.facebox')
	$('#facebox').fadeOut(function() {
	  $('#facebox .content').removeClass().addClass('content')
	  $('#facebox .loading').remove()
	  $(document).trigger('afterClose.facebox')
	})
	hideOverlay()
})

})(jQuery);
